Opening Pressure Test

Using a nozzle tester and Test Oil (ISO 4113) at room temperature, check opening pressure. Connect test line to nozzle holder assembly and tighten fittings.
Close shutoff valve at pressure gauge and operate tester handle sharply several times. Check for proper nozzle position. Spray should be injected into a clean container.
Open shutoff valve at pressure gauge 1/4 turn. Operate tester handle slowly to determine injection opening pressure. Observe gauge reading just before oil is sprayed from tip. Minimum opening pressure is 1500 psi (105 kg/cm² ).